Cavernous lymphangiomas are large, irregular spaces in the lymphatic vascular system that involve the skin and subcutaneous tissues. Cavernous lymphangioma is often referred to as cystic lymphangioma They are non-cancerous fluid filled cysts that are found in vessels that make up the lymphatic system. The lymphatic system consists a network of vessels that carry a fluid called lymph throughout the body. It works to keep fluid levels in the body in balance, and along with the immune system, helps to fight infection.
It is estimated that lymphangiomas occur in about 1 in 4,000 births. They can affect nearly any part of the body, They are most common on the head or neck area, but can occur in other parts of the body. Most lymphangiomas are congenital and are observed at birth while 90 percent will be appear by age two.